Virginia's Declaration of Rights was drawn upon by Thomas Jefferson for the opening paragraphs of the Declaration of Independence. It was widely copied by the other colonies and became the basis of the Bill of Rights.
The ridges found in flexible metal duct create turbulence and will diminish airflow. NEVER use 4 dryer duct or any plastic duct on a range hood installation. The minimum size duct allowed on most range hoods is 3 Â¼ by 10 which is equivalent to 6 round. More powerful hoods require even larger duct sizes up to 10 round. Consult the specifications for the model you have chosen.
Outdoor venting, usually through a duct in the wall, is feasible for any range within 20 feet of an exterior wall, including the roof. The hood should be installed 24 to 30 inches above the stovetop, Ms. Cheever said. It should span the width of the stove, and most of the depth, up to at least half of the front burners.